Plate locking device



H. A. w. woon 1,831,219

PLATE LOCKING DEVICE l Nov. 1o, 1931.

4 sheets-sheet 1 Filed Jan. 26,I 1927 ONK 1 I l l u I l l l l I -H. AQW. woon 'V PLATE LOCKING DEVICE Y Filed Jan. 26,` 1927 Npv. 10, i931.

' I 4 sheets-'sheet .s

um Mg i ISI Patented Nov. lO, 1931 UNITED" sTATEs-v- PATENT ori-ICE HENRY A.. WISE WOOD, OF YORK, N. Y., ASSIGNOR TO WOOD NEWSPAPER MA.- CHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

PLATE LOCKING DEVICE Application led January 26, 1927. Serial` No. 163,685.

.lo cessible from the end ofthe cylinder. This invention also permits of an unusually narrow i margin on the plates as there are no clips beyond the margins to cause the plate to be spread apart.

'1i Other objects and advantages of the invention will appear hereinafter.

Reference is to be *hadv4 tothe accompanying drawings 'in which Fig. 1 is a longitudinal cross section of a part of a printing cylinder taken on a radial plane showing the use o fthis invention forl locking four plates arranged vlong gitudinally on the cylinder;

Fig. 2 is an end view ofthe cylinder on enlarged scale showing thel locking means for each plate in three places around the semi,

circumference Fig. 3 is a sectional view taken radially through the locking means and showing'the plate unclamped;

Fig. 4 is a similar view showing the .plate locked at that point;`

Fig. 5 is a view similar to Fig. 2 showing a'modiication; y

Figs. 6 and 7 are similar to Figs. 3 and 4 showing the same modifications;

Fig. 8 is an end view showing another form of theinvention; l

Fig. 9 is'a radial sectional view of the same;-

Fig. 10 is a transverse sectional view of half a plate cylinder with a locking means thereon for locking the plate circumferential- 1y at its opposite straight edges; A

5 Fig. 11 is a side viewl of the means for operating the plate clamp shown in Fig. 10; and Fig. 12 isa view similar to Fig. 10 showing another form of the invention.

In the form shown in Figs. 1, 2, 3 and 4,

plates A,.B, C, and D as is customary. Each of these plates has a stationary clip 11 at its innerl end. Each of these clips is provided with one or more lugs 12 slanting toward the middle of the cylinder and entering corresponding notches in the plate. These clips hold the inner endsv of the plates and are fixed in the cylinder. l

Each plate is also provided with a clip 13 having lugs 14 slanting in the direction opposite to the lugs 12 and entering notches l15 in the plate near its outer edge but on its concave side. Obviously the movement of the clips 14 outwardly in a longitudinal direction will effectively clamp the plate as will be seen by comparison of Figs. 3 and 4. The

clips 13 are provided with adjusting screws 16 and 17, the latter passing from a clip.

connected with an inner plate through the outer clip, but otherwise these clips are the same. Each adjusting screw passes to a yoke 18 or 19. This yoke inv turn is adjusted by `means of common adjusting screws 20 and 21.

It will be'noticed by reference to Fig. 2 that these ylokes are shown as operating three clips 1n veac case for locking a single plate in three places. The plates on the other end lock in the same way as will be obvious. 4 f In operation the plates are hooked over the lugs'on the stationary clips 11 on the inner edge and laid out on the cylinder. The clips 13 on the outer edge of each plate are pulled outwardly by their respective screws. This clamps the plate without compressing it and prevents buckling. This construction assures that the plates will lie flat on ,the surface of the cylinder. As there is no clampin means at the outer edge of the plate, the p ate vcan be made with a narrow margin.'

Referring now to Figs. 5, 6 and 7 the same principles are employed but a modification is .shown in the form of individual clips.

Here the outer end clip 20 is provided with a. slantingv surface 21 at the rear which rests on a corresponding surface, on a wedge block 22 constituting apart of the clip. u.The clip 20 is held against an adjustable limiting screw 23 b a spring 24. The wedge block 22 is provided7 with a'projection 25 for engaging the rear edge of the clip 20 and positively forcing it outwardly. An adjustable screw 26 connects the block 22 with a yoke 27 which is operated in the same manner as described 1n connectlon with the first sheetof drawings.

When this yoke is moved outwardly by its screw 28, the wedge block 22 moves with it and forces the clip upwardly and finally, by the action ofthe projection 25, outwardly. Alsecond yoke 29 can be used for the other set of clips operated inthe same way.

On account of the upwardand forward motion of the clip', it can be sunk below the surfaceof the cylinder and this alsopermits of'a narrower groove being cut on the inside of the plate. The springs of course move the --clips back when the wedge is withdrawn to the position shownjin Fig. 6.

In the form shown in Figs. 8 and 9 the clamping is performed in the same manner as in Figs. 1, 2.3, and 4 except that the clamping of the plate is accomplished by the pressure of a spring 30 instead of by a screw. This spring is placed' behind each 'clip and acts to move the clip tolock the plate whenever the spring is released to allow it to do so. The spring is compressed bv a handle 31 formed with slantin'gA vteeth 32 co-acting with the edges of slautiug teeth 33 on the hubs of the yokes 34. These vokes connect several clips.

Operation of the handle in one direction lcauses the yoke to compress the springs,

therebv retracting the clips inwardly from f the plates. When the handle is allowed to the details oficonstruction herein shown .and 4 described, but wha-t I do claim is 1. In aplate clamping device, the combinaplate on the cylinder by'pulling the plate along the surface of the cylinder in the direction of the length of the cylinder and means located partly Awithinthe cylinder for operating the clamping means l and accessible from the end of the cylinder.

tion with a clip for holding the inner edge of 3. In a plate clamping means, thecombinaa plate, of a cylinder on which the plate is mounted, said clip being located in the cylinder, a clipv engaging the underside of the plate near its outer edge, and meansfor operating the clip at one end of the plate to move it away from the clip at the other end to secure the late firmly on the cylinder without any ten ency to buckle the plate.

In testimony whereof I have hereunto aiixed. my signature.

' HENRY A. WISE WOOD.

assume the position shown in the drawing@Y theclins are pushed forward by the action of the springas shown. Here. as in the other case. another voke 36 is shown with a handle 37 for operating the screw 38 for the clips on the inner plate.

The constructions above described show clips acting on the curved edges of the plates, The same principle can be employed on clips along the straight edges. The action is idenytical except that the several clips alongthe cvlinder are moved circumferentially by a b ar 40 shown on the last sheet of the drawings. This bar has inclined slots 41- into whichv project pins 42; one extending` from each clip of any of the above mentionel kinds.l This bar runs along the cylinder and when it is moved in or out, the pins 42 of the several clips are moved circumferentially' to lock and unlock theplates Aon one straight edge. On the last sheet I have shown two forms of these clips which are like the first two above described except the operating means, namelyfthe bars 40.

Although I have illustrated and described several embodimentsof this invention I am aware of the fact that other modiiications can be made therein by any person skilled in the artwithout departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited to all 1CD y 

